17 electrons.
about 16
30 electons
7 protons
The Answer is 4.....!
One - assuming the atom is not an ion.
In one atom of Oxygen there are 8 electrons
60
Six in the outer (2nd) shell
An atom of chlorine has 17 protons.
An oxygen atom has six (6) electrons in its outer shell.
There are 17 electrons i a neutral atom of chlorine.
Ionic